// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License.  You may obtain a copy of the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied.  See the License for the
// specific language governing permissions and limitations
// under the License.

// Common protobuf definitions.

syntax="proto2";

package impala;

// Refer to Types.thrift for documentation.
message NetworkAddressPB {
  required string hostname = 1;
  required int32 port = 2;
}

// Proto-serialized version of Impala's Status object.
message StatusPB {
  optional int32 status_code = 1;
  repeated string error_msgs = 2;
}

// 128-bit ID (equivalent to TUniqueID).
message UniqueIdPB {
  required fixed64 hi = 1;
  required fixed64 lo = 2;
}

// The compression codec. Currently used in row batch's header to
// indicate the type of compression applied to the row batch.
enum CompressionType {
  NONE = 0; // No compression.
  LZ4 = 1;
}

// This is a union over all possible return types.
// TODO: if we upgrade to proto3, then we can use the oneof feature in Protobuf 3 in
// the following to save some memory because only one of the fields below is set at a
// time.
message ColumnValuePB {
  optional bool bool_val = 1;
  optional int32 byte_val = 6;
  optional int32 short_val = 7;
  optional int32 int_val = 2;
  optional int64 long_val = 3;
  optional double double_val = 4;
  optional string string_val = 5;
  optional string binary_val = 8;
  optional string timestamp_val = 9;
  optional bytes decimal_val = 10;
}